Second
Grade Math
Vocabulary
Created Summer 2013
a.m.
a time period between
12:00 midnight and 12:00 noon
from graniteschools.org
add
to combine or put together two or
more quantities
from
graniteschools.org
addend
any number being added
7 + 6 = 13
7 and 6 are addends.
analog clock
a clock that shows the time by the
positions of the hour and minute
hand
array
an arrangement of objects in equal
rows and equal columns
attribute
a characteristic of an object, such
as color, shape, size
From graniteschools.org
bar graph
a graph that uses height or length
of bars
to record data
base ten blocks
blocks that can be used to show a
number in the
base ten system
category
a collection of things sharing a
common attribute
From graniteschools.org
compare
to decide if one number is greater
than, less than, or equal to another
from www.education-portal.com
compose
to put together to make a ten or a
hundred
data
a collection of information usually
organized in a graph or chart
decompose
to break apart a number
A hundred can be
decomposed into 10 tens.
A ten can be decomposed
into 10 ones.
difference
the answer to a subtraction
problem
67 - 42 = 35
35 is the difference.
digit
a mathematical way to represent a
numeral
(0,1,2,3,4,5,6,7,8,9)
1-digit number: 4
2-digit number: 64
3-digit number: 364
digital clock
a clock that shows the time with
numbers of hours and minutes,
usually separated with the symbol :
equal parts
parts of an object or group that
have been divided equally into
pieces; can also be called
equal shares
equation
a number sentence with an equal
sign; the amount on one side of the
equal sign has the same value as
the amount on the other side
25 + 43 = 78
estimate
to make an approximate guess
that is close to an exact amount
There are about 10 apples.
even number
an even number can be shown as 2
equal parts. An even number has
0, 2, 4, 6, or 8 in the ones place
6 is an even number.
expanded form
a way to represent a number by
showing the value of each digit
The expanded form of
the above model is
200 + 80 + 2
line plot
a way to represent data on a
number line
odd number
an odd number cannot be shown
as two equal parts. An odd
number has 1, 3, 5, 7, or 9 in the
ones place
5 is an odd number.
order property of
addition
changing the order of the addends
does not change the sum
from graniteschools.org
p.m.
a time period between
12:00 noon and 12:00 midnight
From graniteschools.org
picture graph
a graph that uses pictures to
represent data
repeated addition
adding equal groups of objects to
find the total amount of objects
standard form
a way to represent a number using
digits
282
subtract
the process of taking away objects
from a group
7–3=4
sum
the answer to an addition problem
26 + 42 = 68
68 is the sum.
survey
a way to gather data by asking
people questions
What is your favorite pet?
Animal
Tallies
Number
Dog
llll
5
Cat
llll ll
7
Fish
lll
3
Hamster
ll
2
tally chart
a chart that uses tally marks to
record data
unit of
measurement
a standard used to measure objects.
A ruler is a tool used to measure in standard units of
feet, yards,
centimeter, meter.
Other standard units are
unknown
inches.
a missing number in an equation
often represented with a ? or a
43 = ? + 21
79 = - 14
written form
a way to represent a number using
words
282
two hundred eighty- two.
The written form of
is